Patent Model - Improved Mercurial-Gas Regulator for Nitrous-Oxide Apparatus

Maker and role
John Coolidge, Patentee
Production date
Nov 23 1869
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Object detail

Glass, copper
21 x 17 x 2 1/2" (53.3 x 43.2 x 6.4cm)
The object of Coolidge's patent "is to regulate the amount of illuminating-gas admitted to a burner, which heats a retort or flask containing material for manufacturing nitrous-oxide or other gas evolved by heat, and which may be passed through water for purification." (Patent Number 97,051)
Object number
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